In the meantime, here is a very general overview: YouTube Playlist Downloader (YPD) was a project that I took up to learn Windows Presentation Foundation (WPF). It uses WPF for the user interface and all the animations. Windows Presentation Foundation was released with Microsoft .NET 3.0, which is why there is a requirement for this version of the framework. To get the list of videos in a playlist from YouTube, an external RSS web services is used. The files are then downloaded, and transcoded using FFmpeg.

That’s about the shortest technical overview I could give, and probably still left out too much. Look forward to some code walkthroughs in the next week or so. I haven’t made up my mind yet if it will be available as a .zip file or something where you can browse the source code online ala Google Code.